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2 She'etsf-Sheet 1.

(No ModelJ' A. DGBBIE.

HOISTING MACHINE. Y

y Patented Aug. 22, 1882.

N. PErEns, mvmnwgnpner, wan-ingu. u. c.

(No Model.) 2 Sheets-Sheet`2 A. DGBBIE.

. HoIsTING MACHINE. No. 263.1216. Patented Aug.f22, 1882.

NrrEn STATES!N PATENT Erica.

HolsTlNG- MACHINE.

SPECIFICATION forming part of Letters .Patent No. 263,126, dated August22, 1882.

Application filed June 6, 1882. (No model.)

To all whom it may concern Be it known that I, ARCHIBALD DoBBIE, ofThorold, in the county ofl Welland and Province ot' Ontario, Canada,have invented new and useful Improvements in Hoisting-Machines, ot'which the following is a specification.

This invention rel atcs to an improvement in that class ot'hoisting-machines which are employed for hoisting stones and other loadsin building operations, and for various other purposes, a-nd whichconsists essentially of a drum around which the rope or chain is wound,to which theload is attached, and which is provided withmechanismwherebythe connection between the moving power and the drum can be broken whenthe load has been raised to the desired height, and with a brake bywhich the descent of the load can be controlled. l

The object ot' my invention is to construct a simple and cheaphoisting-machine of thisclass, which iseasily operated and controlled;and my invention consists of the peculiar construction of the mechanismwhereby the moving power can be disconnected from the drum at desire, aswill be hereinafter fully set forth.

In the accompanying drawings, consisting of two sheets, Figure l is anelevation of my improved hoisting-machine.. Fig. 2 is a longitudinalvertical section thereof'. Fig. 3 is an elevation of the rear end ot'the machine. Fig. 4 is an elevation of the driving-end of the machine.Fig."5 is a. sectional elevation of the mechanism whereby the verticalshaft of the machine is,raised and lowered, said mechanism being shownin a raised position. Fig. 6 is a similar view ot' said mechanism in itslowest position. Fig. 7 is a'vertical crosssection in line a? zr, Fig.5, onan enlarged scale.` Fig. 8 is asectional top plan view of thelifting-leveron an enlarged scale. Fig. 9v is a fragmentaryNe/rticalsection of the gear-wheels.

fly, ers of reference refer to like parts ii'r'thes `eral figures.

` AAjrepresent the longitudinal sills of the bed in`e,'and A Across-pieces on which themsiilsrrest, these parts being suitablyconnected together by bolts, so as to form a rigid bed-frame for themachine.

b represents the vertical driving-shaft of the machine, provided at itsupper end with a crosshead, B, to which are secured the sweeps B', towhich the draft-animals are attached when the machine is driven byanimal power.

The upper portion ofthe vertical shaft b turns in a bearing, c, which isformed on an arched standard, C, which extends across the bedframe ofthe machine, and is secured'with its feet to the sills A. The lowervertical portion ot' the shaft b turns in a bearing, cl, secured inarigid bridge-tree, D, which is attached to the sills A. The lower endof the vertical shaft b rests in a step-bearingc, formed in abridgetree, E, arranged l below the""rigidefbridge-tree D and mademovable, so that it can be raised and lowered together with the shaft b,resting thereon.v

F represents a bevel-wheel secured to the vertical shaft b between thelegs of the arched standard C.'

G represents the drum upon which the rope or chain is wound and by whichthe load is suspended, and g is the horizontal shaft or arbor upon whichthe drum rotates. The shaft g is supported at one end in asocket, 71.,formed in theupperportion ofthe arched standard C, in which it issecured by set-'screws h or other suitable means. The opposite end ofthe shaft g is secured in abearing, I, by set-screws. The bearing Irests upon a cross-pieceJ, which is secured between the sills A.

K represents an annular brake rim or wheel secured to or formed on thedriving end ofthe drum G, and la is a brake-band surrounding thebrake-wheel K and operated by a suitable lever, ca, which is pivoted tothe stationary frame ot' the machine.

L represents a bevel-wheel secured to the driving end of the drum G and.adapted to mesh or gear with the bevel-wheel F on the shaft?) when thelatteris in its raised position, as represented in Figs. 1, 2, and 4.

Z represents inclined annular faces or rims, arranged on thebevel-wheels F and L around the outer portionsof'the cogsorletll thereofin such manner that when the two wheels are thrown into gear theinclined faces Z thereof will run in contact with each other and preventthe outer faces of the teeth of one wheel from striking against theopposite wheel between the bases of the teeth thereof, as represented inFig. 9. By this means excessive fric- ICO tion between the wheels isavoided, and the danger of breaking the teeth by throwing the wheelsinto gear is entirely obviated.

m represents a Xed T- bolt supporting one end of the movable bridge-treeE and secured in one of the sills A, the end of the bridgetree beingprovided on its under side with a notch, which rests upon theT- head atthelower end of the bolt and rocks on the same.

n represents a movable T-bolt, attached to the opposite end of thebridge-tree E, and eX- tending upwardly through the sill and through thefoot of the standard C, above'which it is provided with mechanism forraising and loweringit. This mechanism consists of an elbow or kneeshaped lever, O, havingits short arm connected by pivots lo with across-head, P, which is attached to the upperv end ofthe T'` bolt n. Thelong arm of the lever O extends outward at right angles to the shortarm,and terminates in a suitable handle, theinner portion of the longarm of thelever resting upon the foot or base plate O of the standard C.The lever O is arranged in close proximity to the brake-lever le', sothat the operator can conveniently handle either or both levers, as maybe desired.

Q represents a gear-wheel or rim secured to the outer end of the drum G,and q is a pinion meshing in said wheel and mounted on the inner end ofa horizontal shaft, r, which turns in bearings s, cast on or secured tothe bearing I, andwhich is provided at its outer end with a hand-crank,T, whereby the pinion may be rotated.

Assuming the parts to be in the position represented in Figs. 1 to 4,the motion of the vertical driving-shaft b is transmitted to the drum Gby the gear-wheels F and L, and the drum is rotated in a direction inwhich the rope is wound upon the drum, and the load is thereby raised.When the load has been elevated to the desired height the operatorraises the outer end of the elbow-lever O, whereby said lever is turnedon the pivots p, so as to withdraw the long arm of the lever from thesupport O on which it rests, thereby permitting the bolt a and the endof the bridge-tree E, attached thereto, to descend until the short armof the lever comes in contact with the supporting-plate O and arreststhe downward movement of the bolt u and bridge-tree E. The verticalshaft and the gear-wheel F, attached thereto, descend at the same time,whereby the wheel F becomes disengaged from the wheel L, therebydisconnecting the driving mechanism l'rom the drum. The operator at thesame time bears down on the brake-lever, and either supports or lowersthe load by means of the brake, asiiiay be desired. After the load hasbeen lowered and the rope has been attached to another load to be raisedthe slack of the rope', if any, is taken up by turning the drinn bymeans of the hand-crank T. The operator now depresses the long arm ot'the lever O, thereby raising the bolt a and the bridge-tree E andbringing the wheel F in engagement with the wheel L.

The employment of a mechanism for throwing the wheels F and L in and outof gear permits the driving mechanism to be disconnected from the drumwithout first arresting the motion of the motor, whereby the operationof elevating the load is quickly stopped at the desired point andwithout first backing the motor, as isnecessary when clutch-couplin gsare lenfiploy'edL1 'for the purpose.

The heel or corner of the elbow-lever O, at the junction of the shortand long arms of the lever on which it turns on the plate O in shiftingit from one arm to the other, is preferably faced with steel to reducewear and friction.

I claim as my invention- 1. In a hoisting-machine, the combination, withthe drum G, provided with a gear-wheel, L, of the vertical driving-shaftb, provided with the gear-wheel F, and mechanism whereby thedriving-shaft and the gear-wheel attached thereto can be raised andlowered, thereby throwing the gear-wheels in and out ot' gea-r,substantially as set forth.

2. The combination, with a drum, G, provided-with a bevel-gear wheel, L,of a movable shaft, b, provided with a bevel-gear wheel, F, and inclinedannular faces l, formed on said gear-wheels around the teeth thereof,whereby the faces of theteeth of one wheel are prevented from bearingagainst the opposite wheel, substantially as set forth.

3. The combination, with a drum, G, provided with a gear-wheel, L, of avertical drivin gshaft, b, provided with a gear-wheel, F, a movablebridge-tree, E, in which the lower'end ot' the driving-shaft issupported, and mechanism whereby said bridge-tree can bc raised-andlowered, substantially as set forth. 4. The combination, with a drum, G,yprovided with a gear-Wheel, L, of a vertical movable shaft, b, providedwith a gear-wheel, F, a movable bridge-tree, E, supporting the lower endof said vertical shaft, and a bolt, a, and

elbow-lever O, whereby said bridge-'tree can be raised and lowered,substantially as set forth.

A. DOBBIE. Witnesses:

JNO. J. BoNNEu, CHAs. F. GEYER.

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